#include "3rd_party/super_fast_hash.h"

gotpl_ui32 super_fast_hash(const gotpl_i8 * data, gotpl_ui len) {
	gotpl_ui32 hash = len, tmp;
	gotpl_i rem;

	if (len <= 0 || data == NULL)
		return 0;

	rem = len & 3;
	len >>= 2;

	/* Main loop */
	for (; len > 0; len--) {
		hash += get16bits (data);
		tmp = (get16bits (data+2) << 11) ^ hash;
		hash = (hash << 16) ^ tmp;
		data += 2 * sizeof(gotpl_ui16);
		hash += hash >> 11;
	}

	/* Handle end cases */
	switch (rem) {
	case 3:
		hash += get16bits (data);
		hash ^= hash << 16;
		hash ^= data[sizeof(gotpl_ui16)] << 18;
		hash += hash >> 11;
		break;
	case 2:
		hash += get16bits (data);
		hash ^= hash << 11;
		hash += hash >> 17;
		break;
	case 1:
		hash += *data;
		hash ^= hash << 10;
		hash += hash >> 1;
	}

	/* Force "avalanching" of final 127 bits */
	hash ^= hash << 3;
	hash += hash >> 5;
	hash ^= hash << 4;
	hash += hash >> 17;
	hash ^= hash << 25;
	hash += hash >> 6;

	return hash;
}

